issues with asrock 990fx killer

i looked in my bios and i did over clock the CPU NB but not the cpu nb voltage which was set to 1.150v

Ah yes, you had tried the memory from that FX-4300 and it didn't improve the stability. I did some further digging and the G.Skill sticks do in fact seem to be single rank, so 1600 MHz should be okay. The limitation is not caused by the motherboard, it's caused by the FX-series memory controller (CPU-NB), which is why all FX-series CPUs have the same limitations regarding RAM speed. Just to ensure we're on the same page, I'll further point out that CPU-NB and NB are not the same thing: CPU-NB is the memory controller of your CPU while NB is the nortbridge chipset on the motherboard. It's the CPU-NB that you have overclocked, so if something is broken, it should be the CPU.

You could check the motherboard by swapping your FX-8350 for your wife's FX-4300, but that of course is a bit labour intesive... Even though you have a kit of four RAM sticks, I'd first try using only two at a time to see if that has an effect. Also, have you checked your system's temperatures and voltages with HWMonitor? Are you running your system at stock speeds at the moment?

It means that your FX-8350 supports RAM clock speed of 1600 MHz with four sticks only if it's single rank memory. If it's dual rank (couldn't find out if it is or not), the highest supported RAM clock speed is 1333 MHz.

The point of running the test isn't really to solve anything. Since your problems may be memory related, I just think it would be a good idea to double-check that the RAM is working as it should - if lowering the RAM speed helps, that is. You can of course run it in any case. If it makes your system crash, maybe the logfile will give you some additional insight on the root cause of the instability.

Try lowering your memory speed to 1333 MHz and make sure you use the SPD values for the timings. This is why:



If that seems to help, then you should probably still run Passmark's Memtest86 to check the memory sticks work as they should.

Tomlintm wrote: 64 bit i did include all the info you are asking in the post lol

I still don't see where, but hey ....... I know now.

Is your 16GB(4x4GB), one 16GB(4x4) Kit, two 8GB(2x4) Kits, or random sticks?

Check that the BIOS is setting the proper memory voltage for whatever Sniper you have.

Setting them using their XMP Profiles in the BIOS?

One more, but before I'd like to know just what memory Kits you have there.